How to create ISet collection in python

[Dimitar_Venkov]

Have a look at this post:

Help Converting C# code to Python

Dimitar, HashSet works fine in Python/Dynamo: Try this: # Import Element wrapper extension methods import clr import System # Load System.Core assembly that contains HashSet clr.AddReference("System.Core") from System.Collections.Generic import HashSet # Create HashSet myHashSet = HashSet[Autodesk.Revit.DB.ElementId]() Then you can add items to it using the Add() method: myHashSet.Add(someElementId)